that cleaning takes less time than it does with anything else. As I have
already remarked, the small wheel is the culprit which makes the bicycle
and tricycle drive so heavily on a soft road. The ease with which the
Otto can therefore be run through the mud astonishes every one. Having
no little wheel, we can obtain the full advantage of the high 56
inch wheel, which almost every one prefers. As I have ridden all
combinations, from a 50 inch geared up to 60 inch, to a 60 inch geared
level, I can speak from experience of the increased comfort to be
derived from these large wheels, though for speed only they do not
compare with the smaller and lighter wheels geared up. A further point
gained by the use of two wheels only is the fact that the whole weight
of machine and rider is on the driving-wheel, as it is also on the
steering-wheel, so that by no possibility can the wheels be made to slip
in the driving, or to fail in steering from want of pressure upon them.

The most important consequence, however, is the absence of any fixed
frame. In all machines, bicycles and tricycles, with the usual fixed
frame, a position is found for the saddle which is, on the whole, most
suitable. For some particular gradient it will be perfect; on a steeper
gradient the treadles will be further in advance, but with a steeper
gradient the rider should be more over the front of the treadles. To get
his weight further to the front, he has to double up in the middle, and
assume a position in which he cannot possibly work to advantage. The
swinging frame of the Otto carries the treadles, of necessity, further
back, so that the Ottoist, when working at his hardest, is still
upright, with his hands in the line between his shoulders, and his feet
and his arms straight, so that he can hold himself down, and employ his
strength in a perfectly natural position. On going down a slope, the
fixed frame of a bicycle or tricycle leans forward, and places the rider
in such a position that extra weight is thrown on his arms and his